A stronger bit will fix problem horses. I was looking at bits a little bit ago and found some of these. There is absolutely no reason why a horse would ever need a 1/8th inch twisted wire gag bit and if the person thinks they do, they shouldn't have the honor of having a horse. What amazes me is that enough people actually buy these things that they are able to afford mass production. It just makes me mad every time I see one of these cause I know that it cannot be comfortable to the horse just walking around, let alone when a rider is yanking on them. And in my area, that is usually what happens when someone upgrades to something like this is because they yank and pull all the time.
If a horse cannot be controlled in a very mild bit, then the horse and rider both need retraining.
And I am not sure that this one is harsh or not but it just looks mean.